ION-ACOUSTIC NONLINEAR PERIODIC-WAVES IN A 2-ELECTRON-TEMPERATURE PLASMA

We present a comprehensive study of nonlinear periodic waves, namely, the Korteweg-de Vries (KdV) and modified KdV (MKdV) cnoidal waves, and snoidal waves in a two-electron-temperature plasma. In the limiting c ase, these periodic waves reduce to bounded nonlinear structures, name ly, KdV compressive and rarefactive solitons, MKdV compressive and rar efactive solitons, and double layers. The existence regions for these waves in the parameter space (mu(e),sigma(e)), where mu(e) and sigma(e ) are the density and temperature ratios of two electron species, are discussed in detail. The different nonlinear periodic waves and bounde d structures have been explained in terms of physical parameters depic ting the phase curves. It is found that the frequencies of the MKdV cn oidal and snoidal waves have different amplitude dependence behaviors than that of KdV cnoidal waves. The effect of other parameters on the characteristics of the nonlinear periodic waves are also discussed.